Do you know how everyone who isn't Tesla tests equipment like this? They test the units individually, before connecting them to the system/grid/etc, especially

Do you know how everyone who isn't Tesla tests equipment like this? They test the units individually, before connecting them to the system/grid/etc, especially if there are safety risks involved, like a fire that can't be put out until it burns itself out. Everyone defending Tesla on this simply doesn't understand what proper safety looks like at an industrial/utility scale.